safeguard

noun

early warning provides a safeguard against operational crises:

protection, defence, guard, shelter, screen, buffer, preventive, precaution, prophylactic, provision, security, safety measure, surety, cover, insurance, indemnity.

verb

the contract will safeguard about 1000 jobs:

protect, afford protection to, shield, screen, defend, guard, keep safe, shelter;

preserve, conserve, look after, save, secure.

▷antonyms jeopardize.

safeguard Oxford Dictionary of English